Foot-warmer.



F. KUHN & J. A. HAND.

FOOT WARNER.

APPLICATION FILED MAR. 14. 1918.

1 ,288 ,045. Patented Dec. 17, 1918.

2 SHEETS-SHEET I- Clue-mugs F. KUHN & J. A. HAND.

FOOT WARMER.

APPLICATION FILED MAR. 14. I918.

Patented Dec. 17, 1918.

2 SHEETS-SHEET 2.

atto'nncngs UNITED sTA Es PATENT orrrcn.

FRANK KUHN AND JAY A. HAND, 0F DETROIT, MICHIGAN, ASSIGNOBS TOAMERIOANELECTRICAL HEATER COMPANY. OF

MICHIGAN.

DETROIT. MICHIGAN, A CORPORATION OF FOOT-WARNER.

To all whomz't may concern Be it known that we, FRANK KUHN and JAY A.HANm both citizens of the United States of America, residing at Detroit,in the county of l/Vayne and State of Michigan, have invented certainnew and useful Improvements in Foot-Warmers, of which the following is aspecification, reference being had therein to the accompanying drawings.

lhis invention relates to a foot warmer and is designed for use byaviators and motorists or others following vocations requiring exposuresto extremes of cold.

It is the object of the invention to associate heating elements with a.pair of shoes or other footwear preferably in a detachable relation sothat the feet of the wearer will be protected against the danger anddiscomfort resulting from exposure to cold.

In the accompanying drawings:

Figure 1 is a top view of a heating element having the nature of aninsole detachably insertible in an ordinary shoe;

F ig. 2 is. a perspective view of the heel portion of a shoe equippedwith said insole, the electrical connections to the resistor beingshown;

Fig. 3 is a detail sectional view of one of the electrical connections,the section being taken on line 33 of Fig. 2;

4- is a View similar to Fig. 1 but showing the insole provided with amodified form of contact;

Fig. 5 is a perspective view of the heel portion of a shoe provided withcontacts engageable by those carried by said modified insole; Fig. 6 isa sectional view of the modified construction, the section being takenon line 66 of Fig. 5.

Referring now in detail to the invention as disclosed in Figs. 1, 2 and3, the reference character 1 designates a shoe and 2 a heating elementinsertible in said shoe and having the nature of an insole comprisingtwo flexible insulatoryplates, the edges of which are stitched togetheras indicated at 3 and between which a resistor 4 is arranged to trace acircuitous course, said resistor being preferably formed of a braidedwire so that it may have the requisite flexibility.

At each side of the heel portion of the insole 2 the extremities of theresistor 4 are respectively connected to a pair of upwardlySpecification of Letters Patent.

Patented nee. 1'7, 1918.

projecting contacts 5 having the nature of metallic strips, said stripslying closely adjacent the inner face of the upper of the shoe when theinsole is in place. The upper extremities of the contacts 5 are adaptedto be detachably engaged by S-shaped connectors 6 formed of spring-metaland adapted to clamp upon the upper edge portions of the shoe, as seenin Fig. 2. Each of said connectors has a portion adapted to extendwithin the engaged shoe and is formed at its lower extremity with asleeve 7 to receive the corresponding strip 5. Exteriorly of the engagedshoe each connector 6 is provided with a portion slotted vertically, asindicated at 8, said slot being adapted to receive the neck portionof astud 9 projecting from the terminal sleevelO of a conductor 11. Therelative proportioning of the studs 9 and members 6 is such that [lieslotted portion of either member 6 will be sprung out from the centralportion thereof by the head of the engaging stud so that there will beresistance to displacement of the stud from said connector. The centralportion of the connector is concaved, as indicated at 12, for engagementwith said stud and when said engagement is established the member 10 maybe swiveled about the axis of the stud to assume any desired anglewithout disturbing the electrical connection. Such a connection ishighly desirable where the feet of the person using the described devicemust operate one or more foot pedals, and consequently provision forplay is necessary at the point of connection of the conductors to theshoe.

In the modification of Figs. 4 to 6 the resistor embedded in thedetachable insole is provided with terminal contacts 13 of disk shapeupon the under face of said insole, said contacts engaging the heads ofscrews 14 in the heel portion of the shoe when the insole is in place.The screws 14 respectively. engage contact plates 15 which are embeddedin the heel of the shoe at each side thereof, projectinglaterallysufficiently to engage any suitable fixed contacts (not shown). 1

It will be observed that in either form of the invention the electricalconductors may be very quickly attached or detached from the heatingelement; and furthermore that the heating element may, if desired, be

extending from said element, and a pair of members secured to the shoehaving provision interiorly thereof for engagin said terminals, and anexterior provision or engaging lead wires.

3. A foot warmer comprising a shoe, a heating element carried therebyadjacent the sole thereof, a pair of terminals upwardly extending fromsaid element, and a pair of spring clips secured to the shoe havmgprovision therewithin for quick detachable engagement with saidterminals,- and providin exterlorly of the shoe for engagement wit leadwires.

4, A foot warmer comprising a shoe, a heating element carried therebyadjacent the sole thereof, a pair of terminals upwardly extending fromsaid element, and a pair of members secured to the shoe detachablyengaging said terminals "and providing for swivel connection with leadwires.

a shoe, a

5. A foot warmer, comprising a shoe, a detachable insole for said shoe,a heating element carried by said insole, terminal contacts for saidelement carried by the insole, and a pair of connectors detachablyengageable with the upper edge of the'shoe and detachably engaged by'said terminal contacts. I

6. A foot warmer, comprising a shoe, a

heating element carried thereby, terminal contacts for said elementextending into proximity to the upper edge of the shoe, and

a air of connectors detachably engaged with said edge and detachablyengaging said terminal contacts.

7. A foot warmer, comprising a shoe, a

heating element carried thereby adjacent the sole thereof, terminalcontacts mounted upon the edges of the shoe, means for electricallyconnecting said contacts with said heating element, and means forswivelly connecting conductors with said contacts.

8. A foot warmer, comprising a shoe, a heating element carried thereby,a pair of S-shaped connectors, each of said connectors having one of itsreturn-bent portions detachably engaging the upper edge of the shoe andhaving its other return-bent portion slotted to receive a conductor, theconnectorsbeing concaved opposite said slots to form a swivel seat forsaid conductor. v In testimony whereof we afiix our slgna- FRANK KUHN.JAY A.. HAND.

tnres.

